Expansible window screen



Feb. 13., 1923.

D. H. WERTZ.

- EXPANSIBLE wmnow SCREEN.

FILED JAN-6,1919.

Patented Feb. 13, i923.

- entree DUFF BI. WERTZ, OF ST. LOUIS, MISSOURI, ASSIGNOR TO VIOLA. ld.

"Lao has n 'WEH'I'Z, OF ST.

LOUIS, MISSOURI.

EXPANSIBLE iFJIN'DO VJ' SCREEN.

Application filed January 6. 1919.

Z 0 ((2! 7.0713077} it may concern Be it known that l. DUFF H. V/nnrz, acitizen of the United States. and residing at St. Louis, Missouri, anduseful Window 9 a specification.

. This invention relates to window screens of the type contemplating theuse of a metal frame having screen fabric secured therein.

1m provement in i lx iansible and more particularly to window screens ofthe expansible type.

In metal screens of the expansible type as heretofore constructed,diilicultv has been experienced in securing a firm and close jointbetween the screen sections and more particularly the fabric of thecooperating sections. Difficulty has also been experi enced in securinga firm and rigid structure unless the frames were made heavy andtherefore costly.

Some of the objects of this invention, therefore, are to provide anexpansible window screen in which the screen fabric is so secured in themetal frames, in which. the metal frames are so constructed, and inwhich the sections are so joined as to secure close joints, so as tosecure a rigid structure with minimum weight of material, so as tosecure efficient sliding engagement between the frames and so as toproduce a structure which is simple in construction, effective in itsaction and cheap to manufacture.

Further objects will appear from the detail description taken inconnection with the accompanying drawing, in which:

Figure l is an elevation of a screen embodying this invention. showingthe same applied for use;

Figure 2 is an enlarged section on the line 22, Figure 1';

Figure 3 is an enlarged section on the line 3, Figure l;

Figure 4 is an enlarged detail, showing the means and method employed.for securing the screen fabric in the frame;

Figures 5 and 6 are details of one of the screen frame corners,showing-the joint connecting a stile and a rail, the views being omopposite sides and Figure 6 showing the screen clamping element removed;and

Figure 7 is a detail of another corner of the screen, showing the metalbinding applied to the inside edge.

Referring to the accompanying drawing,

have, invented the new creens. of which the following is Serial No.269,770.

fl. designates window frame adapted to receiye a screen embodying thisinvention. This frame may he provided with screen {'ll.2(lfrf i of metalor any other suitable material.

The screen comprises a pair of frames in each. of which secured thescreen fabric. Each frame comprises a stile 3 and a pair of rails l Thestile and rails consist of a bodv 5 of sheet metal in channel form,having concave flanges presenting inside convert surfaces as shown inFigure l. The stile and rails are miter-ed to form joints and arrangedinside of and. connecting the stile and rails at the corner is anangular plate 7 which issecured to both pieces by riveting. soldering orwelding; so to make a firm and. rigid connection. Cooperating with thestile and rails are clamping elements 8 also of sheet metal, which haveconcave flanges 9 and which clampingelement'is arranged to be insertedin the channel formed by the body and flanges of the stile or rails. Thescreen fabric 10 adapted to be secured in the frame thus formed by beingclan'iped between the inner flanges 6 and 9 of the body and clampingelements 5 and. 8, substantially shown and described in Patent No.1,279,625, granted September 1918.

It will be noted that there no stile at the inner end of the frame.There is, however, provided for the screen fabric a binding ll. whichmay he formed of sheet metal bent over the inner edge of the screenfabric as shown in Figure 7, and this binding may have a short lug 12extending between the body and the clamping element, as the flange ofthe clamping element may be cut awl'v at that point. This provides afirm binding and also to some extent a support coni'iectinu the innerends of the. rails. h

In order to secure close cooperation between. the screen frames and moreparticularly'the fabric therein. the fabric should be secured in thescreen frames at the adjoin ing faces of the 'fl'ttlHGS. in order tosecure sliding engagement between the screen frames. the rails havesliding connections. In order to provide such sliding connections, theclamping elements 8 for the rails are formed to provide a rib on theelement of one rail cooperating with a groove in the element of theopposite rail. For this purpose. the clamping element 8 of one rail isformed to provide a depression 13 in which permit rees pe et en f th cre th le have s ired thereto finger pieces 15.

It will, therefore, be seen that the invention accomphshes its ob ects.The frames are secured together for sliding movement by connections madethiongh the ClitIIlPlIlQ elements, thereby bringing the ad o n ng facesof the screen fabric secured by the clamping elements into closeengagement. Furthermore, the construction of each frame is such as topresent a rigid, lint light structure. 7

It is obvious that various changes may be made in the detailsconstruction without departing fromtbe spirit of this invention. it is,therefore, to be understood that this invention is not to be limited tothe specific details shown and described.

H vin t us d scri th n enti n, w et is claimed is:

3 a pensibl Win w e n, c mp is ng, Pair f met iteme Of h nne sect on havng screen fabric secured therein at the inside edges thereof, in orderto present the fabric at the adjoining faces of said frames, and slidingconnections between said frames at and along said d'iein e a a pte t P mexpensidn thereof and maintain the fabric in the frames in surfacecontact.

A11 nm Windo r en cemr i ing, a pair of metal frames having clampingelements adapted to secure the screen fabric to the frames at theiradjoining faces, and a rib on one of said elements engaging a groove inthe other,adapted to permit expansion thereof and to maintain the fabric.in the frames in surface contact.

3. An expansible window screen, comprising, a pair of metal frames,means for securing screen fabric in said frames adapted to present saidfabric t the adjoining faces of said frames, and sliding connections between said securing means adapted to maintain the fabric in said framesin sliding surface contact as the screen is expanded and contracted.

d. in espansible window screen, coi'n ing, a pair-of metal. frames,means for sec-ormg screen fabric in said frames adapted to present saidfabric at the "adjoining faces of said frames, and sliding connectionsbetween said securing H meaiis and arranged w thin said frames ada I)ted to maintain the fabric in said frames in sliding snrface contaL-tas the screen is expanded and contract d.

1 in enpansib le window screen, comprising; a pairof metal frames, meansfor securing screen fabric in said frames adapted to present said fabricat the acjoi'ning faces of said frames, and sliding connections betweensaid securing means" adapted to maintain fabric iii said frames inslidinn s n-fa e contact as the screen is er ipanded ad contracted, theouter faces of said fr mes being formed to provide gi ides.

In testimony whereof I affix my signature this 7th day of December,1-918.-

DUFF n. WERTZ.

